# Amount of nutrients ,such as carbon,nitrogen,phosphorus,calcium etc present in soil at any given time is :-

$\begin{array}{1 1}(a)\;\text{Standing crop}\\(b)\;\text{Nutrient content}\\(c)\;\text{Standing state}\\(d)\;\text{Detritus}\end{array}$

Amount of nutrients ,such as carbon,nitrogen,phosphorus,calcium etc present in soil at any given time is standing state.
Hence (c) is the correct answer.
answered Apr 1, 2014